Face cover

Abstract

A face cover detachably coupled to a head-mounted display apparatus that includes a lens and a lens barrel configured to surround the lens and adjust positions of the lens is provided. The face cover includes a housing including an opening formed in an area thereof, a lens adjustment member disposed in the opening so that at least a portion thereof is exposed through the opening, and an elastic member that includes opposite ends arranged in the housing and a central portion thereof coupled to the lens adjustment member, and is configured to provide an elastic force so as to allow the lens adjustment member to move in a first direction or in a second direction opposite to the first direction. In case that an external force is applied to the lens adjustment member in the first direction, the lens adjustment member is configured to be moved in the first direction such that the lens adjustment member come into contact with the lens barrel. And in case that the lens adjustment member rotates in a first rotation direction in a state where the lens adjustment member and the lens barrel is in contact with each other, the lens barrel is configured to rotate in a second rotation direction opposite to the first rotation direction such that a diopter of the lens is adjusted.

What is claimed is: 
     
         1 . A face cover detachably coupled to a head-mounted display apparatus that includes a lens and a lens barrel configured to surround the lens and adjust positions of the lens, the face cover comprising:
 a housing including an opening formed in an area thereof;   a lens adjustment member disposed in the opening so that at least a portion thereof is exposed through the opening; and   an elastic member that includes opposite ends arranged in the housing and a central portion thereof coupled to the lens adjustment member, and is configured to provide an elastic force so as to allow the lens adjustment member to move in a first direction or in a second direction opposite to the first direction,   wherein in case that an external force is applied to the lens adjustment member in the first direction, the lens adjustment member is configured to be moved in the first direction such that the lens adjustment member comes into contact with the lens barrel, and   wherein in case that the lens adjustment member rotates in a first rotation direction in a state where the lens adjustment member and the lens barrel are in contact with each other, the lens barrel is configured to rotate in a second rotation direction opposite to the first rotation direction such that a diopter of the lens is adjusted.   
     
     
         2 . The face cover of  claim 1 , wherein in a state where the head-mounted display apparatus and the face cover are coupled to each other and the external force is not applied to the lens adjustment member in the first direction, the lens barrel and the lens adjustment member are arranged to be spaced apart by a first distance. 
     
     
         3 . The face cover of  claim 2 , wherein in a state where a distance between the lens barrel and another lens barrel of the head-mounted display apparatus is increased, the lens barrel and the lens adjustment member are spaced apart by a second distance that is greater than the first distance. 
     
     
         4 . The face cover of  claim 1 , wherein the elastic member includes:
 a first portion fixed to a first recess portion of the housing, which is adjacent to the opening,   a second portion fixed to a second recess portion of the housing, which is adjacent to the opening, and   a third portion between the first portion and the second portion, which is coupled to a central shaft of the lens adjustment member.   
     
     
         5 . The face cover of  claim 4 , wherein in case that the lens adjustment member moves in the first direction, the third portion of the elastic member is configured to move in the first direction and a shape of at least a part of the elastic member is configured to be deformed. 
     
     
         6 . The face cover of  claim 1 , wherein the lens adjustment member includes at least one of a wheel or a gear. 
     
     
         7 . The face cover of  claim 1 , wherein the elastic member includes at least one of a plate spring or a coil spring. 
     
     
         8 . The face cover of  claim 1 , wherein in case that the lens adjustment member rotates in the first rotation direction, the lens is configured to move in a front direction or a rear direction of the head-mounted display apparatus. 
     
     
         9 . The face cover of  claim 1 ,
 wherein the head-mounted display apparatus further includes multiple first magnets, and   wherein the face cover further comprises multiple second magnets corresponding to the multiple first magnets.   
     
     
         10 . The face cover of  claim 1 , wherein the elastic member includes:
 a bar connected to a central shaft of the lens adjustment member,   a first spring coupled to a first end of the bar, and   a second spring coupled to s second end of the bar.   
     
     
         11 . A head-mounted display apparatus comprising:
 a lens;   a lens barrel configured to surround the lens and be rotatable so as to adjust a position of the lens; and   a body part detachably coupled to a face cover that includes a lens adjustment member configured to be in contact with a surface of the lens barrel,   wherein based on the lens adjustment member of the face cover rotating in a first rotation direction, the lens barrel is configured to rotate in a second rotation direction opposite to the first rotation direction, and the lens is configured to move in a front direction or a rear direction of the head-mounted display apparatus.   
     
     
         12 . The head-mounted display apparatus of  claim 11 ,
 wherein the body part includes multiple Hall effect integrated circuits (ICs) arranged adjacent to the lens barrel and configured to detect a magnetic field,   wherein the lens barrel includes a magnet attached to inside of the lens barrel, and   wherein the multiple Hall effect ICs are configured to detect information on a diopter of the lens through changes in a magnetic field according to a rotation of the magnet, which corresponds to the rotation of the lens barrel.   
     
     
         13 . The head-mounted display apparatus of  claim 12 , wherein the multiple Hall effect ICs include:
 a first Hall effect IC disposed adjacent to a portion of a path along which the magnet rotates,   a second Hall effect IC spaced a predetermined interval apart from the first Hall effect IC, and   a third Hall effect IC spaced a predetermined interval apart from the second Hall effect IC.   
     
     
         14 . A face cover detachably coupled to a head-mounted display apparatus, the face cover comprising:
 a housing including an opening formed in an area thereof;   a lens adjustment member disposed in the opening so that at least a portion thereof is exposed through the opening; and   an elastic member that includes a central portion thereof coupled to the lens adjustment member, and is configured to provide an elastic force so as to allow the lens adjustment member to move in a first direction or in a second direction opposite to the first direction,   wherein in case that an external force is applied to the lens adjustment member in the first direction, the lens adjustment member is configured to be moved in the first direction, and   wherein in case that the lens adjustment member rotates in a first rotation direction, the lens adjustment member is configured to adjust a diopter of a lens of the head-mounted display apparatus.   
     
     
         15 . The face cover of  claim 14 , wherein the head-mounted display apparatus includes the lens and a lens barrel configured to surround the lens and adjust a position of the lens. 
     
     
         16 . The face cover of  claim 15 ,
 wherein in case that an external force is applied to the lens adjustment member in the first direction, the lens adjustment member is configured to be moved in the first direction such that the lens adjustment member comes into contact with the lens barrel, and   wherein in case that the lens adjustment member rotates in a first rotation direction in a state where the lens adjustment member and the lens barrel are in contact with each other, the lens barrel is configured to rotate in a second rotation direction opposite to the first rotation direction such that the diopter of the lens is adjusted.   
     
     
         17 . The face cover of  claim 15 , wherein in a state where the head-mounted display apparatus and the face cover are coupled to each other and the external force is not applied to the lens adjustment member in the first direction, the lens barrel and the lens adjustment member are arranged to be spaced apart by a first distance. 
     
     
         18 . The face cover of  claim 17 , wherein in a state where a distance between the lens barrel and another lens barrel of the head-mounted display apparatus is increased, the lens barrel and the lens adjustment member are spaced apart by a second distance that is greater than the first distance. 
     
     
         19 . The face cover of  claim 14 , wherein the elastic member includes:
 a first portion fixed to a first recess portion of the housing, which is adjacent to the opening,   a second portion fixed to a second recess portion of the housing, which is adjacent to the opening, and   a third portion between the first portion and the second portion, which is coupled to a central shaft of the lens adjustment member.   
     
     
         20 . The face cover of  claim 19 , wherein in case that the lens adjustment member moves in the first direction, the elastic member is configured such that the third portion also moves in the first direction and a shaped of at least a part of the elastic member is configured to be deformed. 
     
     
         21 . The face cover of  claim 14 , wherein the lens adjustment member includes at least one of a wheel or a gear. 
     
     
         22 . The face cover of  claim 14 , wherein the elastic member includes at least one of a plate spring or a coil spring.